Dredging alleviates cyanobacterial blooms by weakening diversity maintenance of bacterioplankton community

Wenjie Wan; Geoffrey Michael Gadd; Ji Dong Gu; Donglan He; Wenzhi Liu; Wenke Yuan; Luping Ye; Yuyi Yang

doi:10.1016/j.watres.2021.117449

Dredging alleviates cyanobacterial blooms by weakening diversity maintenance of bacterioplankton community

Wenjie Wan, Geoffrey Michael Gadd, Ji Dong Gu, Donglan He, Wenzhi Liu, Wenke Yuan, Luping Ye, Yuyi Yang^*

^*Corresponding author for this work

Environmental Science and Engineering

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

Disentangling ecological mechanisms behind dredging is meaningful to implement environmental policy for improving water quality. However, environmental adaptation and community assembly processes of bacterioplankton in response to dredging disturbance are poorly understood. Based on Illumine MiSeq sequencing and multiple statistical analyses, we estimated interactions, functions, environmental breadths, phylogenetic signals, phylogenetic clustering, and ecological assembly processes of bacterioplankton community before and after dredging. We found distinct change in community composition, comparable decreases in diversity, functional redundancy and conflicting interaction, relatively low phylogenetic clustering, and relatively weak environmental adaptation after dredging. The bacterioplankton community assembly was affected by both stochastic and deterministic processes before dredging, but dominated by stochasticity after dredging. Sediment total phosphorus was a decisive factor in balancing determinism and stochasticity for bacterioplankton community assembly before and after dredging. Consequently, taxonomic and phylogenetic α-diversities of bacterioplankton exhibited higher contributions to the water trophic level represented by chlorophyl α before dredging than afterwards. Our results emphasized bacterioplankton in response to environmental changes caused by dredging, with nutrient loss and ecological drift playing important roles. These findings extend knowledge of contribution of bacterioplankton diversity to water trophic level and decipher mechanisms of bacterioplankton diversity maintenance in response to dredging, which is useful for guiding mitigation of cyanobacterial blooms.

Original language	English
Article number	117449
Journal	Water Research
Volume	202
DOIs	https://doi.org/10.1016/j.watres.2021.117449
State	Published - 1 Sep 2021

Keywords

Anthropogenic disturbance
Environmental breadth
Functional redundancy
Phylogenetic clustering
Phylogenetic signal
Stochastic versus deterministic

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10.1016/j.watres.2021.117449

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title = "Dredging alleviates cyanobacterial blooms by weakening diversity maintenance of bacterioplankton community",

abstract = "Disentangling ecological mechanisms behind dredging is meaningful to implement environmental policy for improving water quality. However, environmental adaptation and community assembly processes of bacterioplankton in response to dredging disturbance are poorly understood. Based on Illumine MiSeq sequencing and multiple statistical analyses, we estimated interactions, functions, environmental breadths, phylogenetic signals, phylogenetic clustering, and ecological assembly processes of bacterioplankton community before and after dredging. We found distinct change in community composition, comparable decreases in diversity, functional redundancy and conflicting interaction, relatively low phylogenetic clustering, and relatively weak environmental adaptation after dredging. The bacterioplankton community assembly was affected by both stochastic and deterministic processes before dredging, but dominated by stochasticity after dredging. Sediment total phosphorus was a decisive factor in balancing determinism and stochasticity for bacterioplankton community assembly before and after dredging. Consequently, taxonomic and phylogenetic α-diversities of bacterioplankton exhibited higher contributions to the water trophic level represented by chlorophyl α before dredging than afterwards. Our results emphasized bacterioplankton in response to environmental changes caused by dredging, with nutrient loss and ecological drift playing important roles. These findings extend knowledge of contribution of bacterioplankton diversity to water trophic level and decipher mechanisms of bacterioplankton diversity maintenance in response to dredging, which is useful for guiding mitigation of cyanobacterial blooms.",

keywords = "Anthropogenic disturbance, Environmental breadth, Functional redundancy, Phylogenetic clustering, Phylogenetic signal, Stochastic versus deterministic",

author = "Wenjie Wan and Gadd, {Geoffrey Michael} and Gu, {Ji Dong} and Donglan He and Wenzhi Liu and Wenke Yuan and Luping Ye and Yuyi Yang",

note = "Publisher Copyright: {\textcopyright} 2021",

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doi = "10.1016/j.watres.2021.117449",

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AU - Wan, Wenjie

AU - Gadd, Geoffrey Michael

AU - Gu, Ji Dong

AU - He, Donglan

AU - Liu, Wenzhi

AU - Yuan, Wenke

AU - Ye, Luping

AU - Yang, Yuyi

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N2 - Disentangling ecological mechanisms behind dredging is meaningful to implement environmental policy for improving water quality. However, environmental adaptation and community assembly processes of bacterioplankton in response to dredging disturbance are poorly understood. Based on Illumine MiSeq sequencing and multiple statistical analyses, we estimated interactions, functions, environmental breadths, phylogenetic signals, phylogenetic clustering, and ecological assembly processes of bacterioplankton community before and after dredging. We found distinct change in community composition, comparable decreases in diversity, functional redundancy and conflicting interaction, relatively low phylogenetic clustering, and relatively weak environmental adaptation after dredging. The bacterioplankton community assembly was affected by both stochastic and deterministic processes before dredging, but dominated by stochasticity after dredging. Sediment total phosphorus was a decisive factor in balancing determinism and stochasticity for bacterioplankton community assembly before and after dredging. Consequently, taxonomic and phylogenetic α-diversities of bacterioplankton exhibited higher contributions to the water trophic level represented by chlorophyl α before dredging than afterwards. Our results emphasized bacterioplankton in response to environmental changes caused by dredging, with nutrient loss and ecological drift playing important roles. These findings extend knowledge of contribution of bacterioplankton diversity to water trophic level and decipher mechanisms of bacterioplankton diversity maintenance in response to dredging, which is useful for guiding mitigation of cyanobacterial blooms.

AB - Disentangling ecological mechanisms behind dredging is meaningful to implement environmental policy for improving water quality. However, environmental adaptation and community assembly processes of bacterioplankton in response to dredging disturbance are poorly understood. Based on Illumine MiSeq sequencing and multiple statistical analyses, we estimated interactions, functions, environmental breadths, phylogenetic signals, phylogenetic clustering, and ecological assembly processes of bacterioplankton community before and after dredging. We found distinct change in community composition, comparable decreases in diversity, functional redundancy and conflicting interaction, relatively low phylogenetic clustering, and relatively weak environmental adaptation after dredging. The bacterioplankton community assembly was affected by both stochastic and deterministic processes before dredging, but dominated by stochasticity after dredging. Sediment total phosphorus was a decisive factor in balancing determinism and stochasticity for bacterioplankton community assembly before and after dredging. Consequently, taxonomic and phylogenetic α-diversities of bacterioplankton exhibited higher contributions to the water trophic level represented by chlorophyl α before dredging than afterwards. Our results emphasized bacterioplankton in response to environmental changes caused by dredging, with nutrient loss and ecological drift playing important roles. These findings extend knowledge of contribution of bacterioplankton diversity to water trophic level and decipher mechanisms of bacterioplankton diversity maintenance in response to dredging, which is useful for guiding mitigation of cyanobacterial blooms.

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KW - Environmental breadth

KW - Functional redundancy

KW - Phylogenetic clustering

KW - Phylogenetic signal

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Dredging alleviates cyanobacterial blooms by weakening diversity maintenance of bacterioplankton community

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Keywords

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